<div id="test3">
    这里是3.html
    <div data-bind="text:showdata3">

    </div>
    <script type="text/javascript" src="./jquery.min.js"></script>
    <script type="text/javascript" src="./knockout-3.3.0.js"></script>
    <script type="text/javascript" src="./3.js"></script>
</div>